Spark Scala当中reduceByKey(_+_) reduceByKey((x,y) => x+y)的用法

[学习笔记]

reducebykey(_+_)是reducebykey((x,y) => x+y)的一个 简洁的形式
*/

    val rdd08 = sc.parallelize(list((1, 1),  (1, 4),(1, 3), (3, 7), (3, 5)))
    val rdd08_1 = rdd08.reducebykey((x, y) => x + y)
    println("reducebykey 用法 " + rdd08_1.collect().mkstring(","))

    sc.stop()
  }

  def myunion(rdd05: rdd[int], rdd06: rdd[int]): unit = {
    val res: rdd[int] = rdd05.union(rdd06)

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